Multiple Choice
Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm) . A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude?
A) The star is getting colder.
B) The star is getting hotter.
C) The star is moving toward us.
D) The star is moving away from us.
Correct Answer:
Verified
Correct Answer:
Verified
Q17: X-rays,because they have more energy,travel through space
Q21: Studying a spectrum from a star can
Q22: From laboratory measurements, we know that a
Q23: How are wavelength, frequency, and energy related
Q24: Which of the following is not an
Q27: When an electron in an atom goes
Q28: From lowest energy to highest energy, which
Q29: Which of the following properties of a
Q30: Suppose you watch a leaf bobbing up
Q41: Most astronomical objects emit light over a